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Pyrom Thermal Flasher socket

Pyrom Thermal Flasher socket

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Here is a circa 1960's Pyrom thermal flasher socket. During the "off" cycle the lamp filament remains heated as can be seen in the photo using a 25w bulb.

neonplug.jpg DSC00243.JPG flasherskt.jpg sturdee.JPG

Light Information

Light Information

Manufacturer:Pyrom Pty Limited
Model Reference:Flasher
Lamp
Lamp Type:Incandescent only
Base:BC/B22
Electrical
Wattage:100 maximum
Voltage:240
Physical/Production
Factory Location:Sydney Australia

File information

File information

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Filename:flasherskt.jpg
Album name:rapidstart / Misc switches, sockets
Keywords:Gear
File Size:933 KB
Date added:May 15, 2015
Dimensions:2048 x 1536 pixels
Displayed:179 times
Date Time:2015:05:16 12:12:34
DateTime Original:2015:05:16 12:12:34
Exposure Bias:0 EV
Exposure Time:1/760 sec
FNumber:f 8
Flash:Flash
Focal length:9.3 mm
ISO:100
Make:SONY
Model:CYBERSHOT
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Medved
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May 15, 2015 at 11:54 PM Author: Medved
The reason for the parallel heater connection is not that much to keep the lamp preheated (during normal flashing it won't cool down that much anyway), but to make the flasher insensitive to the exact lamp wattage (the heater just sees the 240V and has nothing to do with the current).

No more selfballasted c***

rapidstart
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May 16, 2015 at 12:22 AM Author: rapidstart
Oh... OK. I just thought it was to help prolong lamp life

Say 'O' for an Osram, think about tonight today (old advertising jingle)

Medved
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May 16, 2015 at 01:22 AM Author: Medved
Anyway it is quite nice find, never seen such creation...

I know about "red neck" method (when was a kid, it was in a decoration for kid's "disco") using fluorescent starters: It uses two 25..40W lamps in parallel, all that in series with one such lamp. Parallel to the single lamp is then a fluorescent starter. The lamps are then alternatively blinking...
Of course, the starter is the component with the shortest life there...

No more selfballasted c***

rjluna2
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Robert


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May 16, 2015 at 06:27 PM Author: rjluna2
The reason why it glows during 'off' cycle is that the heater and bulb are working in series. Once the bimetallic strip makes contact, most of the current goes through the bimetallic strip leaving minimum current flow at the heater element. Then the cycle repeats

Pretty, please no more Chinese failure.

rapidstart
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May 16, 2015 at 07:50 PM Author: rapidstart
Thanks Robert

Say 'O' for an Osram, think about tonight today (old advertising jingle)

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